机械与动力工程河南科技HenanScienceandTechnology总第799期第5期2023年3月110kV主变压器近区连续短路故障分析及治理措施郑鸿彦1,2(1.海南电网有限责任公司电力科学研究院,海南海口570311;2.海南省电网理化分析重点实验室,海南海口570311)摘要:【目的目的】本研究通过深入分析一起110kV主变压器遭受近区连续短路冲击故障的案例,为保证变压器的安全运行提供一定的借鉴和帮助。【方法方法】本研究通过对变压器故障过程、解体情况、制造工艺及抗短路能力计算结果进行详细分析,寻找主变压器故障的原因,并提出针对性防范措施。【结果结果】经多维度分析后得出,主变压器发生故障是因主变压器抗短路能力不足,导致低压绕组在近区短路电流电动力的持续作用下发生变形,并造成匝间绝缘击穿短路。【结论结论】近区短路是导致主变压器发生故障的重要原因,对老旧主变压器应加强运维管理,并优化保护定值整定,降低近区短路的故障风险,确保主变压器能安全稳定运行。关键词:主变压器;近区短路;故障;治理措施中图分类号:TM407文献标志码:A文章编号:1003-5168(2023)05-0051-05DOI:10.19968/j.cnki.hnkj.1003-5168.2023.05.010AnalysisandTreatmentMeasuresofthe110kVTransformerFaultCausedbyNearFieldShortCircuitZHENGHongyan1,2(1.ElectricPowerResearchInstituteofHainanPowerGridLimitedLiabilityCompany,Haikou570311,China;2.KeyLaboratoryofPhysicalandChemicalAnalysisforElectricPowerofHainanProvince,Haikou570311,China)Abstract:[Purposes]Throughin-depthanalysisofacaseof110kVmaintransformersufferingfromnear-zonecontinuousshort-circuitimpactfault,thisstudyprovidessomereferenceandhelpforensur⁃ingthesafeoperationoftransformers.[Methods]Inthisstudy,thefaultprocess,disintegration,manufac⁃turingprocessandshort-circuitresistancecalculationresultsofthetransformerareanalyzedindetailtofindthecauseofthemaintransformerfaultandproposetargetedpreventivemeasures.[Findings]Aftermulti-dimensionalanalysis,itisconcludedthatthefailureofthemaintransformerisduetotheinsuffi⁃cientshort-circuitresistanceofthemaintransformer,whichleadstothedeformationofthelow-voltagewindingunderthecontinuousactionoftheshort-circuitcurrentelectrodynamicforceintheneararea,andcausestheinter-turni...